package com.yugu.park.security.controller;

import cn.hutool.core.codec.Base64;
import cn.hutool.core.util.IdUtil;
import io.swagger.annotations.Api;

import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.ui.ModelMap;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import com.google.code.kaptcha.Producer;
import com.yugu.util.Constants;
import com.yugu.util.ResponseUtil;
import com.yugu.park.exception.BusinessException;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
/**
 * 获取验证码
 * @author 31631
 *
 */
@RestController
@Api(tags = {"获取验证码"})
public class CaptchaController{

    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

//    @Resource
//    private RedisService redisUtils;
    @Resource
    private RedisTemplate<String, String> redisTemplate;
    
    private String captchaType = "math";
    
    @GetMapping("/captchaImage")
    public ResponseUtil.Result<ModelMap> getCode(ModelMap modelMap, HttpServletRequest request, HttpServletResponse response) {
    	// 保存验证码信息
        String uuid = IdUtil.simpleUUID();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;
        String capStr = null, code = null;
        BufferedImage image = null;

        // 生成验证码
        if ("math".equals(captchaType))
        {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        }
        else if ("char".equals(captchaType))
        {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }
        redisTemplate.opsForValue().set(verifyKey,code,Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try
        {
            ImageIO.write(image, "jpg", os);
        }
        catch (IOException e)
        {
            throw new BusinessException(e.getMessage());
        }
        
        
        modelMap.put("uuid", uuid);
        modelMap.put("img", Base64.encode(os.toByteArray()));
        return ResponseUtil.addSuccess(modelMap);
    }

}
